Conditional Aggregation Techniques for Data Analysis: Grouping by Date and Calculating Various Metrics

Extract Distinct Data from SQL Tables Using Advanced Techniques

Understanding Composite Keys and Inheritance in MySQL: A Scalable Approach to Database Design

How to Convert MySQL/MariaDB DATETIME to Unix Timestamp: Best Practices and Workarounds

Retrieving the Most Recent Record for Each ID: A SQL Solution

Advanced SQL Joins Using CASE or IF Statements

Mastering MySQL Query Syntax: A Step-by-Step Guide to Identifying and Fixing Errors

Dynamically Generate MySQL Where Clauses Using User Input Parameters

Mastering Window Functions in SQL: A Comprehensive Guide to Calculating Values from Current Row and Previous Row

Understanding Null and Conditional Logic in SQL Queries